Title: Syllable Intelligibility for Temporally--ltered Lpc Cepstral Trajectories

Running Title: Syllable intelligibility for ltered cepstral trajectories Received: T. Arai et al., \Syllable intelligibility for ltered cepstral trajectories," JASA 2 Abstract We measured the intelligibility of syllables whose cepstral trajectories were temporally ltered. The speech signals were transformed to their LPC cepstral coeecients, and these coeecients were passed through diierent lters. We re-combined these ltered trajectories with the residuals and reconstructed the speech signal. We then measured the intelligibility of the reconstructed speech segments in two perceptual experiments for Japanese syllables. We report on the eeect of various low-pass, high-pass, and band-pass ltering and summarize the results using a theoretical approach based on the independence of the contributions in diierent modulation bands. The overall results suggest that speech intelligibility is not severely impaired as long as the ltered spectral components have a rate of change between 1 Hz and 16 Hz. T. Arai et al., \Syllable intelligibility for ltered cepstral trajectories," JASA 3 1 INTRODUCTION